/*!	 ducktransform_rotate.h
**	 Template Header
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifndef __SYNFIG_STUDIO_DUCK_TRANSFORM_ROTATE_H
#define __SYNFIG_STUDIO_DUCK_TRANSFORM_ROTATE_H

#include "duckmatic.h"
#include <synfig/angle.h>

namespace studio
{

class Transform_Rotate : public synfig::Transform
{
private:
    // synfig::Angle angle;
    synfig::Vector origin;
    synfig::Real sin_val;
    synfig::Real cos_val;

public:
    Transform_Rotate(const synfig::GUID& guid, const synfig::Angle& angle, const synfig::Vector& origin = synfig::Vector(0, 0)):
        Transform(guid),
        origin(origin),
        sin_val(synfig::Angle::sin(angle).get()),
        cos_val(synfig::Angle::cos(angle).get())
    {
    }

    synfig::Vector perform(const synfig::Vector& x)const
    {
        synfig::Point pos(x - origin);
        return synfig::Point(cos_val * pos[0] - sin_val * pos[1], sin_val * pos[0] + cos_val * pos[1]) + origin;
    }
    synfig::Vector unperform(const synfig::Vector& x)const
    {
        synfig::Point pos(x - origin);
        return synfig::Point(cos_val * pos[0] + sin_val * pos[1], -sin_val * pos[0] + cos_val * pos[1]) + origin;
    }

    synfig::String get_string()const
    {
        return "duck rotate";
    }
};

};

#endif